Biden met in Paris with Ukrainian President Volodymyr Zelenskyy, who appealed for bipartisan U.S. support going forward “like it was during World War II.”

The move comes as Ukrainian officials have stepped up calls on the U.S. administration to allow its forces to defend itself against attacks originating from Russian territory.

While Ukrainian leaders urged governments from Berlin to Washington to ease the restrictions on supplied weapons, western countries appeared increasingly divided.

The Biden administration has stepped up warnings about China's support for Russia and threatened new sanctions in response from the U.S. and other NATO countries.

President Vladimir Putin warned that hitting Russian soil with Western-supplied weapons could set the war on a dangerous new path.

'NATO is increasing the degree of escalation,' a Kremlin spokesman said, after NATO's head called for alliance members to alet Ukraine to use Western weapons in Russia.

Russia has been bombarding Ukraine with air assaults and missiles originating from the Russian mainland that have destroyed critical infrastructure as well as military targets.

European Union countries formally adopted a plan on Tuesday to use windfall profits from Russian central bank assets frozen in the EU for Ukraine's defense.

NATO’s top soldier said Ukraine’s flag 'will be hoisted in front of (NATO’s) headquarters' one day. The United States' top soldier said allies are rushing to get arms to Kyiv.

The advisory warns cyber actors backed by Russia, China and other countries are increasingly targeting non-profit and advocacy groups, journalists and other civil society members.

Kharkiv regional police said that by Sunday afternoon, Russian forced were approaching the town of Vovchansk from three directions.

Moscow's forces have captured five villages as part of a renewed ground assault in Ukraine’s northeast, the Russian Defense Ministry said Saturday.

The big U.S. aid package for Ukraine signed Wednesday allows the administration to seize Russian state assets located in the U.S. and use them for the benefit of Kyiv.

The move came as Zelenskyy said his country's army is facing “a really difficult situation” in eastern regions where troops are battling to hold back Russia.

A British minister said the country will expel a Russian military attaché accused of being an undeclared military intelligence officer.